Lamp-socket.



O. WINSTON.

LAMP socKEI. APPLIQATIGN FILED NAYS. |916- RENEWED FEB. I6 I9I8.

1,279,628. Patented sept. 24,1918.,

7Y/ TNESISIES UMTED STATES PATENT ormoni :ovnnronwmsroivror MINNEAPOLIS, MINNESOTA..

' LAMP-sooner.

Application filed May 8, 1916, VSerial No. 96,162.

T0 @ZZ-107mm may concern: i

` Be it known that I, YOVERTON IWINSTON, a citizenl of the'United States, residing at Minneapolis, in the county -of Hennepin nand State Yof Minnesota, haveV invented ,certain fneuT and usefu'lmprove'ments jin Lamp- Sockets; yand l `do hereby declare the following tofbea fulLclear, and exact description ofthe inventiomsuch 'as will venable others skilled inthe art to Whichit apper- .ftains to make and use the same. l p

My present invention Vhaspfor its'obj-ect-fto provide animproved lamp Isocket for. headlights, and is'in the nature Vof an improvement on or modification of the socket 'disclosed 'and claimedy in my companion application, SCN. 96,161, filedlofeven date `here- With and -entitled lLam-p socket. In-the companion application and' inthe present application, the socket comprises va sleeve anda so-called lamp holding collar, rwhich latter is provided iv'ithan eccentric portion that has threaded engagement With l'the -said sleeve.V Within the sleeve is a -coiled spring that 'takes up" -the 'slack or play 'betiveenjthe eccentric andl sleeve 'and assists in' preventing naccidental-rotation of said eccentricand its holdingfcdllar. lin-*accordance With the presfent inventioml'make la Vsort of a .ratchet illustrating ktherstill further lslightly-*modi- 'l fied form of the socketillustrated in'Fig. l; f

and Fig. 3 is a similar vieW to Fig. 1l but illustrating a somewhat modied construction.

Referring nrst to the construction illustrated in Fig. 1, the numeral 1 indicates an electric light bulb of the double base and three contact type, such, for example, as

that illustrated in my pending application S. N. 91,226,'filed of date, April 14, 1916, and entitled Headlights A bulb of this character has three contacts 2, 3, and 4. The

Specification of Letters Patent. u

Paten-ted sepa-224, 19158.

Renewed February 16, 1918. i Serialof. 2171713."` i

outer contact '2 is in the form of va metallic:

sleeve 'which surrounds the shank ofthe bulb; the conta-@t3 is `vinfthe'form ofy ametallic .ringapplied to the end of the "and the contact 4 isin the'form of 'a small metal disklocatedv .at the axis oftheshank,"j

the saidv 'three Vcontacts being insulated from each other by the material of the1 said shank. The contact sleeve has a plurality', 'as shown,

The contacts-leave@ of the vbulb isadapted to be telescoped into a holding collarj that 5 is provided With 2in-externally threaded 'eccentric 6a; The lugs 5 ofthe collar 2 are p two radially projecting lock lugs '5,'for apur- 4;. YV"pose Which vWillv presently appear;

adapted to be inserted through internal i grooves 7 the holding collar 6 and tobe internalshoulder 8A of said collar. Said'parts kSand 7 are indicated by dotted .lines only,` `but are more fully disclosed `in my.` ri'orapjturned intoengagement with a corrugated plication-SN. 86,851, filedMarch 2 th,f1916,

entitled'Headlightsf7` l .v The Iexternally threaded` eccentric l6 of the holding collar 6 is screwed intot'hfev in- -ternal threads 9a o'f'asocket sleeve-9 inthe rear end lof Whichis insulatingblock 10 that has a f-rictional-ly'spring-pressed axially projecting contact plunger. 11, the :.headof which engages theaXial contact 4 of the light bulb, VWhen the latter is in position." The so-'called holding collar 6 and the sleeve YA9 constitute an adjustable lamp socket, and'by rotation of said collar and its threadedeccentric, the light bulb may ybe adjusted Aboth llongitud-inally and transversely of the airis of the socket, a-nd hence ofthe aXis rof ".:the

reflector, not shown, 'but which VWill `be usual-ly employed in headlights Where the lsocket is applied. The metallic head of gthe :contact plunger 1'1 'is provided lvv-itha rigidly secured surrounding-'collar 12 ofnsulating material, the ently appear. n

The numeral 13 indicates a sop-called cenpurposel of zWhich vvill pres-v tering sleeve'which is of insulating material and Which is telescoped into and rigidly secured to the eccentric 6a, so thatit becomes a lsectional part thereof. As shown, said centering sleeve 13 also has 1 external threads *Y that engage the internal threads `9ajof the sleeve f Y The rear portion of the passage through the centering.v sleeve13 is Venlarged to form a bearing shoulder,and this shoulder 14 has a corrugated metallic facing 14a thatis engaged by the pointed, or pawl-like end of a coiled spring 15 that is compressed between the same andthe insulating block 10 and surrounds a hub portion 1()a of the lat ter. The rear end of the spring l5 is anchored to the insulatingblock 10 against ro' yslightlyV at its point of contact, as shown.

Obviously, the lamp may be adjusted both l axially and transversely of the axis of the socket when the holding collar 6A and its Y eccentric@a and centering collar 13 are rovertical position,

tated. This adjustment of the said collar may be produced by taking hold of the same with the fingers, or it may be done by rotating the light bulb while its lock lugs 5 are engaged with the corrugated shoulder S. It is frequently7 however, desirable to rotate the light bulb so as to set its filament in a for example, without changing the adjustment of the holding collar 6, and this may be done by pressing rearward on the bulb so as to carry its lugs 5 out of engagement with the corrugated shoulder 8 and then rotating the said bulb. When the said bulb isrotated, there will be some frictional vengagement between its shank andV the holding collar, but accidental rotation of the said collar will then be prevented by the friction between the threads and by the further resistance to such rotation caused by the engagement of the end of the tension spring 15 with the corrugated shoulder 14 of the centering sleeve 13;

'Ihe construction illustrated in Fig. 2 is like that illustrated in Fig. 1, except that the front end of the tension spring 15u is less pointed, or, in other words, is slightly rounded so that it has a less positive engagement withthe corrugations of the shoulder 14.

The construction illustrated in Fig. 3 is designed for a so-called single base or twocontact light bulb, and the contact spring 16 and centering sleeve 13 are dispensed with, the corrugated shoulder 14 is formed directly on the inner end of the eccentric 6a and the tension spring 15b has only a slightly curved end that engages directly with the said corrugated shoulder 14, and hence, offers a little less resistance tothe rotation of the holding collar than is offered by the ar rangements illustrated in Figs. 1 andy 2.

What I Vclaim is:

l. A'lamp socket comprising a sleeve and a lamp holding collar rotatively mounted within said sleeve and having an` annular corrugated shoulder independent of its lamp holding structure, and a spring re-acting against said sleeve and having-an end engaging the said corrugated shoulder.

2. A socket comprisinga sleeve and a collar provided with an eccentric having threaded engagement with the interior of said sleeve, said eccentric having a corrugated shoulder, and said sleeve having.Y a plug, and a spring re-acting against said plug at one end and having its other end engaged with said corrugated shoulder.

3. A socket comprising a sleeve and a collar provided-with `an eccentric having threaded engagement with the interior of said sleeve, said eccentrichaving Ya corrugated shoulder, said sleeve having a plug,

.anda coiled spring anchored to saidplug at one end and having its other end pointed and engaged withl said corrugated shoulder.

4c. In a lamp socket, the combinationwith a sleeve having a lplug in one end, and internal threads in itsother end, of a holding collar provided with an eccentric 'having external threads engagingV the internal threads of said sleeve, a centering sleeve of linsulating material secured to said eccentric and provided with a corrugated vinternal shoulder, and a tension springre-acting against said plug at one end and with its other end seated against the said corrugated'v shoulder.

Y In testimony whereof I afiix my signature y in presence of two witnesses. V

OVERTON WINSTON.

Witnesses:

CLARA DEMAREsT, i B. Gr. WHEELER.

Copie: of this patent may be obtained for ve cents each, by addressing the Commissioner oi lialtentg',

Washlnztola, D-C. v 

